Table 6.

Linear regression model of predictors of higher expenditures for antimalarial drugs

		Univariate model		Multivariate model
Risk factors	n	Estimated effect (95% CI)	P*	Estimated effect (95% CI)	P*
Case scenario
- Child 2–4 months	20	1		1
- Child 1–4 years	22	-0.12 (-0.42 to 0.18)	0.423	-0.16 (-0.37 to 0.05)	0.124
- Adult	26	-0.15 (-0.44 to 0.13)	0.285	-0.25 (-0.45 to -0.06)	0.012
Number of products	68	0.19 (0.11 to 0.27)	<0.001	0.12 (0.05 to 0.19)	0.001
Shop type
- General shop	50	1		1
- Drug store	18	0.75 (0.56 to 0.95)	<0.001	0.59 (0.38 to 0.80)	<0.001
Location
- Ifakara	15	1		1
- DSS	53	-0.11 (-0.39 to 0.17)	0.434	-0.06 (-0.24 to 0.13)	0.548

*Wald test of significance of effect